Patents by Inventor Donald P. Chennells

Donald P. Chennells has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7179077
    Abstract: A concrete block-molding machine having a concrete mix feed station, and a concrete molding and block ejection station adjacent to the feed station wherein the concrete molding and block ejection station has a vibratile plate having a plurality of holes in a pre-selected hole pattern, a mold having a mold interior positionable on the vibratile plate and having holes in the pre-selected hole pattern, and a support plate dimensioned and patterned to form a bottom face of a molded concrete block. An ejector plate having a plurality of projecting rods in the pre-selected hole pattern is positionable below the vibrating plate, with the rods of a diameter such that they pass through the holes in the vibratile plate and the mold. Means are provided for raising and lowering a pressure plate assembly so as to compress a concrete mix in the mold provided. Means are also provided for raising and lowering the ejector plate so as to contact and raise and lower the support plate out of and into the mold.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: February 20, 2007
    Inventor: Donald P. Chennells